298 



Annals Entomological Society of America [Vol. IV, 



When, however, the characters of the mother are compared 

 with those of her offspring which are of the same form as herself 

 little uniformity was found. In no case did she rank at the 

 highest point of the curve, neither did she ever occur at the 

 lowest point, nor ever outside of the range of variation for the 

 offspring. There seemed to be some degree of heredity but it 

 was not constant. The results appear a good deal the same as 

 in the elytra, that there are centers of variation and a certain 

 limit of range that were inherited to a greater or less degree, but 

 with no evidence of segregation of unit characters such as occurs 

 between melano pleura, annectans, and liumcralis. 



ADDENDA. 



Since sending the foregoing article to the publisher results 

 have been obtained in the experiments concerning the relation 

 of coloradensis, the so-called albinic form of annectans, and a 

 similar form of melanopleura to the other forms treated. The 

 albinic form of annectans, so-called for want of a better name is 

 above described separately under annectans and figured at F, 

 Plate I. The albinic form of melanopleura is identical with 

 that of annectans in pronotal characters, namely, it lacks the 

 lateral dot, the lateral margin of the pronotum being broadly 

 pale as in color adensis; in all other characters it agrees with 

 melanopleura. The results obtained are tabulated as follows: 



* A means annectans; C, color adensis; H, humeralis; al. A. albinic annectans; 

 al. M, albinic melanopleura. 



t These are given as shown by the offspring when not known from 

 breeding. 



JThis male was, judging from appearance, an intergrade between annectans 

 and albinic annectans. It lacked the basal spots on the elytra but possessed the 

 lateral dot on the pronotum, which latter seems to be the ultimate distinguish- 

 ing character. 



